Electric connector



May 26, 194.2. E 2,284,231

ELECTRIC CGNNECTOR Filed March 2'7, 1941 2 Sheets-Sheet l Inventor .GdrF/e/cf, 7 712 e A Home Patented May 26, 1942 a m re ' ELECTRIC ooNNEo'roa I Garfield Price, Gary, Ina;

' Application March 27, 1941, Serial No. 385,536

2 Claims. (cl. 173 -343) I x This invention relates to an electric connector and more particularly to improvements on the type of electric connector set forth in my U. S. Letters Patent No. 2,221,925, issued November 19, 1940. The primary object of this invention is the provision of a positive securing means for the plug in the casing to obviate any chance of said parts becoming accidentally detached during use and which may be easily operated to release the plug fromthe casing whenever it is desired to reverse the plug in said casing.

Another object of thisinvention is the provision of improved electrical connections between the contact elements of the plug and the conductors which enter the casing and which also act to frictionally' secure the plug in the casing to eliminate play between said parts, and will in no way interfere with the removal and the replace- Figure l is a side elevation illustrating an electric connector constructed in accordance with my invention.

Figure 2 is a vertical sectional view illustrating the casing and one of the contacts therein.

Figure 3 is a perspective view illustrating one of the contacts of the casing and a contact of the plug for cooperating with the contact of the casing in establishing an electrical connection.

Figure 4 is a sectional view taken on the line 4-4 of Figure 1.

Figure 5 is a vertical sectional View illustrating the casing with the plug therein.

Figure 6 is an end-view illustrating the casing with the plug removed. I

Figure 7 is a side elevation illustrating one part of the plug and the contact members carmeral 5 indicates an insulated casing including a cylindrical portion 6 and a neck I integral with one end of the casing and provided with a bore 8 through which an extension'cord 9 may extend to permit the conductorslll thereof to'enter the casing and be secured in place by set screws threaded in the casing and which extend through contact'strips l2. ranged opposite to each other in the casingand against the walls thereof having angularlyrelated ends apertured to receive the set screws and further said contact strips are apertured to receive set screws I3 which alsothread into the V casing and assist, the set screws in'firml securing the contact strips in place.

The casing 5 is fully open at its end opposite to the neck land inwardly of thelopen end an internal shoulder strips being shaped to fit the shoulder I4, as clearly shown in Figure 5. a

The purpose of the shoulder I4 is to limit the inward movement of a plug l5 intosaid casing.

The plug'l5 consists of portions I6 and l! and the portion l6 includes companionqsections secured together by-a bolt I8 which also threads into the portion I! of the plug for detachably connecting, said portion llto'the portion It.

At one end of the portion I1 is an electric contact |9 and said portion I! is further provided with a contact ferrule 20.

Mounted in the plug i5 are contact members 2| which project a limited distance beyond one end of the plug while the opposite ends are located in the portion H and one of the contact members connects with the ferrule 20 while the other contact member connects with the contact l9. 1

The contact members 2| are secured in the plug l5 by set screws 22 which extend through spring contacts 24 which protrude slightly out wardly of the grooves to be'aragainst the contact strips l2 when the plug is inserted in the casing. Ends of the spring contacts 24 are embedded in the portions 6 of the plug and are'secured to the contact members 2| to establish electrical connection therewith. The other ends of the spring contacts are free to slide in theigrooves when pressure is exerted on said spring contacts, as for instancewhen brought into'engagement with the contact strips l2 on the insertion of the plug-into the casing. v r r The construction of the pkg l5 as described in detail and shown in the drawings permits this connectorto be threaded into an electric output The'contact strips l2 are ar- I4 is located, the contact outwardly of the casing or position the portion ll with the ferrule 20 outwardly of the casing.

The casing isprovided with'bayonet slots 26 'toireceive set screws 21 carried by the plug.

This form of connection between the casing and the plug provides a positive securing means between said parts so that any possibility of the plug moving accidentally out of the casing is eliminated. V

While I have shownand described. the preferred embodiment of my invention, it will be understood that minor changes in construction,

combination and arrangement of parts may be i made without departing from the spirit and scope of the invention claimed. ,1 o i Having thus described my invention, whatiI claim is: 1 a

I. In an electric connector, an insulated casing having'one' end open with its-interior of cylindrical shaperin cross section, contact strips extending longitudinally in the casing and located at opposite-sides thereof, means 'for connecting a the strips'to conductorsa, plug of non-conduct ing material having a snug fit in the casing-and removable through the open end thereof and said plug being rotatably. arranged in the casing, the open end of the casing, having bayonet slots therein, projections on' the plug for engaging the slots and detachably holding the plug in the easjacent the grooves and an outwardly bowed contact strip of spring metal in each groove, with v one end bent inwardly and connected with a congroove, said bowed strips engaging the strips of the casing when the plug is inserted in the casing, and turned to place the projections of the plug in locking engagement with the bayonet slots of the casing. I i

2. In an electric connector, a casing of nonconducting material, contact strips in the casing located at opposite sides thereof, means for connecting the strips to conductors, a plug of nonconducting material removably fitting in the casing, said plug being composed of two sections, a bolt passing longitudinally through the sections for connecting them together, contact strips passing through the sections and having their ends projecting from the ends of the plug, spring strips threaded socket therein for receiving the portion of the bolt which connects the two sections of the first plug together, a ferrule encircling the second plug, means for electrically connecting the ferrule to one of the plug strips when the two plugs are connected together a contact on the outer end of the second plug and means for electrically ing, said plug having longitudinally extending,

oppositely arranged groovesin its sides," contact strips passing through the plug and located adconnecting the said contact with the other plug strip when the two plugs are connected together.

GARFIELD PRICE, 

